Shielded electrode holder



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May 24, 1938. M, swEDA SHIELDED ELECTHODE- HOLDER Filed Oct. 2l, 1956 ,NAem.

May 24, 193s. y M, SWE'DA 2,118,274

SHIELDED ELECTRODE HOLDER Filed 0G13. 2l, 1936 2 SheetS-SheefI 2 MichaelSwed@ Patented Mty 24, 193s UNITED STATES PATENT OFFICE SBIELDEDELECTRDDE HOLDER.

Michael Sweda, Youngstown, Ohio .Application October 21, 1936, SerialNo. 106,830

l Claim. `(Cl. 219-8) This invention is an improvement in electrodeholders, and consists of a shield equipped holder of novel construction.

An object of the invention is to provide in an electrode holder animproved handle construction.

A further object of the invention is to provide electrode holdersequipped to accommodate rods of various sizes, and to secure theelectrode at any one of several different angles.

Still another object of the invention is to provide a completelyinsulated electrode holder which will not arc at any point on the holderexcept where desired, namely at the point of electrical contact withthe. electrode.

Also it is an object of the invention to provide a ventilated handle forthe electrode holder, together with an efiicient heat shield assemblyfor the handle.

'I'he objects of the invention also include that of providing novelconnections between conduc-V tor elements of the electrode holder.

The invention, its objects and advantages will be more apparent from thefollowing detailed description, when read in connection with theaccompanying drawings, wherein:

Fig. l is a side elevational view of my improved electrode holder.

Fig. 2 is an, enlarged longitudinal sectional view therethrough.

Figs. 3 and 4 are detail sectional views taken on the lines 3 3 and 4 4,respectively of Fig. 1.

Fig. 5 isfa front elevational view of the holder. Fig. 6 is aperspective view of a. conductor rod.

Figs. '7 and 8 are detail sectional views taken substantially on thelines 1 1 and 8 8 respectively of Fig. 2.

Fig. 9 is a side view', of the end of one of the cables showing themanner oi bending its extremities.

Fig. 10 is a detail sectional view of the forward end of a modied formof head.

Referring to the drawings by reference numerals, it will be seen that inthe preferred embodiment thereof, the electrode holder comprises ahandle 5, preferably cylindrical and of suitable insulating material.Handle 5 may have a smooth exterior, as shown, or have external ribs toprovide better purchase when the handle is gripped for turning.

At one end the handle I is suitably provided with an externally threadednipple or extension 6 on which is screwed a head 1.

Head 'l is preferably of the shape shown, is socketed al illustrated.and is made from porcelain or any insulating material. Ventilating slots32 are provided in the handle as shown.

At the open end of the head l are provided internal threads 8 tocomplement the nipple 6 as shown.

At the inner end of the head 1 is a small diameter portion 9 into whichis insertable through an opening IIi, one end of the electrode Il.Laterally displaced from opening III` is a recess I2 in the wall ofportion 9 for receiving the vinserted 10 end of the electrode when it isdesired to position the latter at an obtuse angle relative to ,theholder.

A conductor rod I3 has a sliding t with a restricted diameter portion I4of head 'I as shown 15 in Figs. 2 and '7. At one end said rod isprovided with an enlarged threaded head I5.

A section I6 of a conductor cable has loosely engaging one end thereof acoupling'sleeve I1, internally threaded as shown and adapted to bethreaded on the head I5 of the conductor rod I2 to couple said rod andcable section together and in electrical connection one with the other,as hereinafter referred to.

A second cable section I8 is electrically con- 25 `nected with the cablesection I6 through the medium of an improved connection I9.

Connection I9, as shown in Fig. 3 consists of a rod 2li of conductivematerial having threaded ends 2|, 22, with which are screw threadedlyen- 30 gaged coupling sleeves or sockets 23, 24, sleeve 23 serving toelectrically connect cable I6 to rod 20, and sleeve 24 serving toelectrically connect rod 2Ii and an end of cable section Il.

A suitable 'tubular cable guide 25 having its 35 inner end threaded asat is connected to the aforesaid second cable section I8 through theinstrumentality of.a coupling sleeve or socket 26, said cable guidebeing preferably of hook shape to prevent that portion of the cableadjacent the 4'0' handle and pass/ing therethrough from twisting andkinking when operating the electrode holder. It wilibe noted thatcoupling sleeves or sockets Il, 23, 24 and 26 are identical inconstruction, each having the inner end of its socket frustroconical asat 2l.

Further each cable end has the strands of the cable spread, as clearlyshown. Thus as a coupling sleeve is tightened the strand spreaded end isforced to wedge itself into the inner frustro- 5c conical end of thecoupling socket to insure a positive and efilcient connection between acable end and its associated coupling sleeve, as will be clear from aconsideration of either Figures 2,- 3

For the holder there is also provided a front head shield 28, in theform of a plate constructed from suitable insulating material andsuitably apertured to receive the end of head 1 as shown bestin Figs. 2and 4. A suitable tie rod 29 is employed for clamping the shield on thehead.

Also a second heat shield substantially semicylindrical in cross sectionis disposed at the underside of handle 5 and extends upwardly atopposite sides of said handle as shown. At one end shield 30 is securedtothe edge of front shield 2B at intervals by screws or the like 3|.

Shields 28 and 30 together with slots 32 serve to prevent heating of thehandle.

With the parts assembled as shown in Fig. 2 it will be seen that theinserted end of electrode Il! is clamped with head 1 by screwing homethe nipple or handle extension 6. Handle extension or nipple 6 abuttingat its inner end coupling socket l1 will cause the latter, together withconductor rod I3 to move as a unit inwardly of the head 1 and toward theleft in Fig. 2 to engage rod I3 with the inserted end of electrode l0.

Rod I3 thus cooperates with the end wall of socket portion 9 to secureelectrode l0 at substantially right angles to head l, and with recess l2to secure said electrode at substantially an obtuse or oblique angle tosaid head.

In Fig. 9 of the 'drawings the cable I6 which is preferably of theconventional strand type has its extremities separated and turnedinwardly as indicated at I6. Through the instrumentality of thisstructure the cable when jammed by the connecting elements thereof willnot only tend to spread but will resist axial stress against separationfrom its connections should they become loosened. l

The head 'l' illustrated in Fig. 10 of the drawings is formed of anysuitable material and is provided with portions 9' and I4' andopeningll) similar to like portions heretofore referred to, the headbeing so modified as to p rovide an opening I2 in alignment with theopening l0 to permit the electrode ll to extend therethrough. Thisstructure permits use of an electrode of any length and also adjustmentthereof relative to the head.

Having thus described claimed as new is:

An electrode holder including a hollow head having a lateral openingforthe insertion of an electrode, ,a conductor rod slidably mounted insaid head and having its forward end adapted to engagev the electrode, ahandle screwed into the rear end of said head, a sleeve screwed on therear end of the rod, said sleeve extending rearwardly of the rod andhaving a reduced rear end, and a cable passing thro-ugh said handle andthe rear end of said sleeve, said cable having an enlarged rorward endlling the wider open part of the sleeve and forced by the sleeve intoclose contact with the rod, said handle engaging the rear end of thesleeve to force the rod into close contact with the electrode.

the invention what is MICHAEL swEDA.

